pvec: use absolute_import

mercurial/pvec.py

@@ -48,8 +48,13 b' Uses:'
   different branches
 '''
 
-import base85, util
-from node import nullrev
+from __future__ import absolute_import
+
+from .node import nullrev
+from . import (
+    base85,
+    util,
+)
 
 _size = 448 # 70 chars b85-encoded
 _bytes = _size / 8

tests/test-check-py3-compat.t

@@ -117,7 +117,6 b''
   mercurial/lsprofcalltree.py requires print_function
   mercurial/mail.py requires print_function
   mercurial/manifest.py not using absolute_import
-  mercurial/pvec.py not using absolute_import
   setup.py not using absolute_import
   tests/filterpyflakes.py requires print_function
   tests/generate-working-copy-states.py requires print_function